Let’s go through a sample application that authenticate using Github. complete source code of this library and sample application is available onGithub.
Setup
Using Gradle
The Github-OAuth library is pushed to jcenter, so you need to add the following dependency to your app's build.gradle.
As a module
If you can't include it as gradle dependency, you can also download this GitHub repo and copy the library folder to your project.
Usage
Obtaining GithubAuthenticator instance
Obtaining an access token via the GithubAuthenticator
Authenticate will open a new Dialog Fragment with webview and user token will be returned on callback
Enable logs
Scope can also be defined (optional)
Available scopes are from developer page

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